@CockWomble Check track your claim on the link but can take up to 7 days for validation https://20202.samsungpromotions.claims/gb/en/pages/notepreorder/how-it-works
As per terms and Conditions :
"Claims must be submitted between 00.01 (BST) 21 August 2020 and 23:59 (BST) 20 September 2020 (the "Claim Period"). Claims received outside the Claim Period will be marked as invalid and will not be accepted." - so just checking you did not claim before 21 August.